S
M
T
W
T
F
S
26
63°
51°
27
67°
47°
28
74°
48°
29
74°
48°
30
75°
49°
1
71°
53°
2
60°
53°
3
66°
54°
4
67°
51°
5
62°
52°
6
73°
51°
7
76°
53°
8
69°
52°
9
73°
51°
10
74°
53°
11
89°
48°
12
73°
53°
13
67°
55°
14
80°
48°
15
78°
49°
16
69°
49°
17
76°
49°
18
82°
63°
19
87°
49°
20
86°
53°
21
90°
53°
22
79°
52°
23
71°
54°
24
73°
55°
25
67°
55°
26
68°
53°
27
69°
51°
28
67°
53°
29
66°
52°
30
76°
47°
31
86°
52°
1
88°
53°
2
75°
52°
3
79°
53°
4
82°
54°
5
80°
52°
6
79°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Pleasanton
Pleasanton's May 2026 forecast shows daily high temperatures ranging from 66° to 88°, with overnight lows between 47° and 54°. The average high for May is 78° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Pleasanton. See also: June | July | August.
